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    FINNED CERAMIC TUBE AND ITS PRODUCTION
    4.
    发明专利
    FINNED CERAMIC TUBE AND ITS PRODUCTION 失效

    公开(公告)号：JPH09263458A

    公开(公告)日：1997-10-07

    申请号：JP7697296

    申请日：1996-03-29

    Applicant: NGK INSULATORS LTD

    Inventor： HAYASHI SHINZO ,  MIYAMOTO MITSURU ,  DOI MASARU

    IPC: F28F1/32 ,  C04B37/00 ,  F28F21/04

    Abstract: PROBLEM TO BE SOLVED: To produce a finned ceramic tube usable as each heat exchanger tube of a multitude heat exchanger made of ceramics. SOLUTION: A tubular body 2 made of a ceramic sintered compact is fitted with many ring-shaped fins 4 each made of a ceramic unsintered compact and having a through hole for passing the tubular body 2 at prescribed intervals and the fins 4 are fired to join the tubular body 2 and the fins 4 in one body by utilizing the difference in shrinkage by firing between the tubular body 2 and the fins 4.

    METHOD FOR PRODUCING CERAMIC STRUCTURE
    5.
    发明专利
    METHOD FOR PRODUCING CERAMIC STRUCTURE 审中-公开

    公开(公告)号：JP2003089575A

    公开(公告)日：2003-03-28

    申请号：JP2001276347

    申请日：2001-09-12

    Applicant: NGK INSULATORS LTD

    Inventor： HAYASHI SHINZO ,  DOI MASARU ,  SUZUKI YOSHIHIRO

    IPC: C04B38/06 ,  C04B35/195

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a ceramic structure, by which crushing of a foamed resin during processes such as kneading and the deformation of a formed body at the time of forming are almost suppressed, and the porous ceramic structure of a high porosity cordierite can be obtained. SOLUTION: The ceramic structure producing method for obtaining the porous ceramic structure of cordierite comprises mixing a cordierite raw material containing an alumina component, water, and if needed, a forming aid to obtain a raw material mixture, then kneading the raw material mixture, forming the kneaded mixture to obtain a formed body, and firing the formed body. Hydraulic alumina is used as a portion of the alumina component, and a foamed resin is added into the raw material mixture.

    EXTRUSION MOLDING METHOD OF CERAMICS
    7.
    发明专利
    EXTRUSION MOLDING METHOD OF CERAMICS 失效

    公开(公告)号：JPH02171208A

    公开(公告)日：1990-07-02

    申请号：JP32557188

    申请日：1988-12-23

    Applicant: NGK INSULATORS LTD

    Inventor： KATO SHIGEKI ,  DOI MASARU

    IPC: B28B3/20 ,  B28B21/52

    Abstract: PURPOSE:To improve dimensional accuracy, by a method wherein a part of structure of a supporting rest and the remainder are made respectively porous and nonporous and respective relations are specified. CONSTITUTION:A supporting rest is constituted of a porous part and nonporous part formed on both sides of the porous part, in an extrusion molding method of ceramics where the ceramics extruded through a mouth piece of an extruding machine is extrusion-molded continuously while holding under a state where the ceramics is floated slightly by air through the supporting rest. The supporting rest is constituted so that an expression D/9

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